Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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CHRIST. HUGENII
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<
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<
s
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xml:space
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">At cum nondum gr. </
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<
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echoid-s6808
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xml:space
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">8 aut 9, plus verò quam ſenis, ec-
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centricus locus Saturni à 20{1/2} gr. </
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<
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echoid-s6809
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xml:space
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">♍ aut ♓ aberit, videtur
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etiam apparens locus expendendus eſſe, nempe circa quadra-
<
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tum quem vocant Saturni cum Sole aſpectum. </
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>
<
s
xml:id
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echoid-s6810
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xml:space
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">Fieri enim
<
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poterit ut non ultra gradus unius ſemiſſem locus apparens
<
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ab æquinoctii loco remotus ſit, ideoque viſus noſter tantum
<
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12′ ſuper annuli ſuperficiem exurgat; </
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<
s
xml:id
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echoid-s6811
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xml:space
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">quæ cum à Sole ſimul
<
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debiliter illuminetur, vix puto ſe videndam præbebit. </
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>
<
s
xml:id
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xml:space
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">Quum
<
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autem duo contingant quadrati aſpectus ſingulis Saturni ful-
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ſionibus, priori eorum ita demum illud quod diximus per-
<
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pendere opus erit, ſi locus planetæ ex Sole præcedat gr.
<
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/>
</
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>
<
s
xml:id
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echoid-s6813
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xml:space
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">@0{1/2} ♍ aut ♓, poſteriori verò non niſi ſequatur. </
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>
<
s
xml:id
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xml:space
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preserve
">Nam ſi ſe-
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cus fuerit jam certo brachiis auctus cernetur.</
s
>
<
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xml:space
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</
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<
s
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echoid-s6816
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xml:space
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">Et ſic quidem quod maximè perplexum in toto hoc nego-
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tio inerat, nulla diſſimulata difficultate, pertractavimus. </
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<
s
xml:id
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xml:space
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">Il-
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lud enim inquirere voluimus an certis locis rotunda phaſis
<
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alligari poſſet, ita ut omnibus huc uſque obſervatis fieret
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ſatis. </
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<
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xml:space
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">Quod & </
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<
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xml:space
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">præſtitimus tandem, etſi arctis adeo limiti-
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bus circumſcripti, ut ne minimum quidem ultra citrave ab
<
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iis diſcedere ſalvis apparentiis licuerit. </
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>
<
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xml:id
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xml:space
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">Simul verò hoc ope-
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ræ pretium fecimus, quod de futuris Saturni phaſibus haud
<
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/>
dubia prænuntiare in poſterum licebit. </
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>
<
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xml:space
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">Etenim ſi modo ta-
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bularum Aſtronomicarum ope inveniatur, quo tempore Sa-
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turni locus ex ſole ſive eccentricus, cadat in gr. </
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<
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xml:space
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">20, 30′ ♍
<
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vel ♓; </
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<
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xml:space
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">ſenis menſibus qui id tempus præcedunt totidemque
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ſequentibus brachia nulla percipi poſſe maniſeſtum erit; </
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<
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xml:space
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">quo-
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niam ſcilicet in menſes ſingulos gradu uno Planetæ locus ex
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Sole promovetur. </
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<
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xml:space
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">Præterquam quod aliquando uno etiam
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atque altero menſe citius rotunda phaſis exiſtet, aliquando
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tanto diutius videri perſeverabit; </
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>
<
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xml:space
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">ſi nempe quadrante cæli
<
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per id tempus Saturnum à Sole diſtare contingat, locuſque
<
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Planetæ eccentricus, ea qua diximus lege, præcedat vel ſe-
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quatur ♍ aut ♓ gr. </
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<
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<
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">30′.</
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<
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">Secundùm hæc igitur, quoniam in gr. </
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<
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xml:space
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">20, 30′ ♓ incidit
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locus eccentricus die 12. </
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<
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1672 Saturnum brachiis cariturum; </
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<
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xml:space
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">non toto utriuſque </
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